In this example, a new slice was added to a volume, d10,
which contains the mounted file system /home2. The growfs command specifies the mount point with the -M
option to be /home2, which is expanded onto the raw volume /dev/md/rdsk/d10. The file system will span the entire volume when
the growfs command is complete. You can use the df-hk command before and after to verify the total
disk capacity.

Note –

For mirror and transactional volumes, always run the growfs command on the top-level volume, not a submirror or master
device, even though space is added to the submirror or master device.